Izengezo ze-coating zisetshenziswa ngenani elincane ku-Coatings, kepha zingathuthukisa kakhulu ukusebenza kwezimbozo, futhi zibe yingxenye ebaluleke kakhulu yezimbali. I-Shimperer uhlobo lwezengezo lwe-hehelogical, olungakwazi ukuqina kuphela futhi luvikele ukugcwala ngesikhathi sokwakha, kodwa futhi luphinde lunikeze ukuhlanganiswa kwezakhiwo ezinhle kakhulu zemishini nokuqina kwesitoreji. Kuyisigaba esibaluleke kakhulu sezithasizo zamapende asuselwa emanzini anokubonakala okuphansi.
Izinhlobo eziyi-1 zabakhudlwana bamanzi asuselwa emanzini
Njengamanje, kunezinhlobo eziningi zabakhulu abatholakala emakethe, ikakhulukazi kufaka phakathi ama-inorganic, amaselula, ama-polyrrylates kanye nabahlanganisi abahlaziyi be-polyurethane. I-Inorganic Shidener uhlobo lwamaminerali we-gel amunca amanzi futhi anwebe ukuze akha i-thixotropy. Kukhona ikakhulukazi i-Bentonite, i-attapulgite, i-aluminium siliate, njll., Phakathi kwayo i-bentonite esetshenziswa kakhulu. Ama-cellulosic amikhulu anomlando omude wokusebenzisa futhi kunezinhlobo eziningi, kufaka phakathi i-methyl cellulose, i-cardboxylopyl cellulose, i-hydroxypypropylllose, i-hydroxypropylllose, i-hydroxypropylll methyl cellulose, njll. Okusetshenziswa kakhulu kwalokhu kuyi-hydroxyethyl cellulose. Ama-polyacrylate amikhulu angahlukaniswa ngezinhlobo ezimbili: enye i-polyacrrylate yamanzi; Okunye yi-Homopolymer noma i-copolymer emulsion simikhulu ye-acrylic acid ne-methacrylic acid. I-acicic ngokwayo, futhi kufanele ihlangane ne-alkali noma i-ammonia amanzi ku-Ph 8 ~ 9 ukufeza umphumela wokuqina, owaziwa nangokuthi acrylic acid alkali ukuvuvukala okukhula. AbakwaPolyurethane bakhudlwana basanda kuthuthukiswa abakhuthazayo abakhuthazayo eminyakeni yamuva.
Izici ezi-2 zabakhulu abahlukahlukene
2.1 Cellulose Shirener
Ama-cellulosic amikhulu anokusebenza okuphezulu okuthuthukayo, ikakhulukazi ekuqineni kwesigaba samanzi; banemingcele engaphansi ekwakhekeni kwama-coaging futhi basetshenziswa kabanzi; Zingasetshenziswa kunhlobonhlobo ye-pH. Kodwa-ke, kukhona ababi abanjengokwezinga elibi, ukugaxeka ngokwengeziwe ngesikhathi sokuhlanganiswa kwe-roller, ukuzinza okungekuhle, futhi kusengozini yokuwohloka kwe-microbial. Ngoba inokubona okuphansi ngaphansi kwe-shear ephezulu nokubonakala okuphezulu ngaphansi kwe-static ne-shear ephansi, i-viscosity inyuka ngokushesha ngemuva kokugcoba, kepha ngakolunye uhlangothi, kungadala amandla amancane. Ucwaningo luye lwabonisa ukuthi njengoba isisindo se-molecular esilinganayo sokwenyuka, okuchithekayo kwe-latex Paint nakho kuyanda. Ama-cellulosic amikhulu athambekele ekunciphiseni ngenxa yesisindo sawo esikhulu se-molecular. Futhi ngoba iselula ku-hydrophilic ngaphezulu, kuzonciphisa ukumelana kwamanzi kwefilimu yokupenda.
2.2 acrylic mkhulu
Abakhulu be-polyacrylic acid banezakhiwo eziqinile zokuqina kanye nokulinganisa, kanye nokuqina okuhle kwebhayoloji, kepha zizwela i-pH futhi zinokumelana kwamanzi ampofu.
2.3 Associative Polyurethane Shidener
Ukwakheka okuhlekisayo kwe-Associative Polyurener Shidener kubhujiswa ngaphansi kwesenzo se-Shear Force, futhi i-visa yehle. Lapho amandla we-shear enyamalala, ukubonwa kungabuyiselwa, okungavimba into ye-SAG kwinqubo yokwakha. Futhi ukululama kwalo kwe-viscosity kune-hysteresis ethile, evumelana nokufakwa kwezinga lefilimu yokuhlanganisa. Isisindo se-molecular esihlobene (izinkulungwane zamashumi ezinkulungwane) ze-polyurethane likhulu liphansi kakhulu kunesisindo se-molecular (amakhulu ezinkulungwane zezigidi) zezinhlobo ezimbili zokuqala zabakhulu, futhi ngeke zikhuthaze ukugeleza. Ama-molecule e-polyurethane akhulu ama-hydrophilic kanye namaqembu ama-hydrophobic, futhi amaqembu e-hydrophobic anobudlelwano obuqinile ne-matrix yefilimu yokuhlanganisa, engathuthukisa ukumelana kwamanzi kwefilimu yokuhlanganisa. Kusukela izinhlayiya ze-latex zibamba iqhaza enhlanganweni, ngeke kube khona ukugcwala, ngakho-ke ifilimu yokuhlanganisa ingabushelelezi futhi ibe nokukhanya okuphezulu. Izakhiwo eziningi zabahlanganisi be-polyurenane ziphakeme kunabanye abakhulu, kepha ngenxa yendlela yazo eyingqayizivele yokuqina kwe-micele, lezo zingxenye ekwakhekeni kwe-miClelles zithinta ngokungafanele izici zokuqina. Lapho usebenzisa lolu hlobo lomkhulu, ithonya lezinto ezahlukahlukene ekusebenzeni kokuqina kufanele libhekwe ngokugcwele, futhi i-emulsion, i-deforsant, usizo lwefilimu, njll. Isetshenziswa ku-coating akufanele ithathelwe indawo.
2.4 ama-inorganic omkhulu
Ama-inorganic amikhulu anezinzuzo zokuqina okuqinile, okuhle Thixotropy, ububanzi be-PH, nokuqina okuhle. Kodwa-ke, njengoba i-Bentoni ithi i-inorganic powder emunxuse enhle yokukhanya, inganciphisa kakhulu i-gloss surface gloss of film ye-coating futhi isebenze njenge-ejenti yokuthola imali.
Isikhathi sePosi: Dece-27-2022